SB2023112171 - Privilege escalation in Linux kernel jbd2
Published: November 21, 2023
Security Bulletin ID
SB2023112171
CSH Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Local access
Highest impact
Code execution
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Use-after-free (CVE-ID: CVE-2022-28796)
CWE-ID: CWE-416 - Use After Free
CVSSv4: CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear
The vulnerability allows a local authenticated user to escalate privileges on the system.
The vulnerability exists due to a transaction_t race condition within the jbd2_journal_wait_updates() function in fs/jbd2/transaction.c. A local authenticated user can trigger a use-after-free error and escalate privileges on the system.
Remediation
Install update from vendor's website.